{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell line", "cell type", "DNA", "protein", "RNA"], "input": "Two domains centered at positions -345 and -540, respectively, bind proteins that are present in megakaryocytic cells and nonrelated cells as well."}
{"cell line": ["megakaryocytic cells"], "cell type": ["nonrelated cells"], "DNA": [], "protein": [], "RNA": []}